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120820 (1998 HL89)
Classification: Main-belt Asteroid          SPK-ID: 2120820
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08370461616304152 4.0876e-08  
a 2.745442232845515 1.6604e-08 au
q 2.515636044547378 1.1843e-07 au
i 13.51992166219317 4.6037e-06 deg
node 206.9134504986959 1.6717e-05 deg
peri 302.2472907227201 3.7096e-05 deg
M 6.63222464683956 2.9712e-05 deg
tp 2458969.889274738585
(2020-Apr-30.38927474)
0.0001372 TDB
period 1661.56330355317
4.55
1.5073e-05
4.127e-08
d
yr
n .2166634272857122 1.9655e-09 deg/d
Q 2.975248421143653 1.7994e-08 au
  Orbit Determination Parameters
   # obs. used (total)      895  
   data-arc span      8038 days (22.01 yr)  
   first obs. used      1998-04-21  
   last obs. used      2020-04-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55092  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 20:40:11  

Additional Information
 Earth MOID = 1.55048 au 
 Jupiter MOID = 2.07308 au 
 T_jup = 3.303 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.0   n/a MPO453678  

120820 (1998 HL89)          Discovered 1998-Apr-21 by LINEAR at Socorro
Reference: 20060314/Numbers.arcLast Updated: 2006-03-23
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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